net.sf.jsqlparser.expression.BinaryExpression Maven / Gradle / Ivy

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JSqlParser parses an SQL statement and translate it into a hierarchy of Java classes. The generated hierarchy can be navigated using the Visitor Pattern.

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/*
 * #%L
 * JSQLParser library
 * %%
 * Copyright (C) 2004 - 2013 JSQLParser
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as 
 * published by the Free Software Foundation, either version 2.1 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public 
 * License along with this program.  If not, see
 * .
 * #L%
 */
package net.sf.jsqlparser.expression;

/**
 * A basic class for binary expressions, that is expressions having a left
 * member and a right member which are in turn expressions.
 */
public abstract class BinaryExpression implements Expression {

	private Expression leftExpression;
	private Expression rightExpression;
	private boolean not = false;

	public BinaryExpression() {
	}

	public Expression getLeftExpression() {
		return leftExpression;
	}

	public Expression getRightExpression() {
		return rightExpression;
	}

	public void setLeftExpression(Expression expression) {
		leftExpression = expression;
	}

	public void setRightExpression(Expression expression) {
		rightExpression = expression;
	}

	public void setNot() {
		not = true;
	}

	public boolean isNot() {
		return not;
	}

	@Override
	public String toString() {
		return (not ? "NOT " : "") + getLeftExpression() + " " + getStringExpression() + " " + getRightExpression();
	}

	public abstract String getStringExpression();
}